Automatic control device for rail car brake

Abstract

The invention discloses a rail car brake automatic control device, which belongs to the technical field of vehicle monitoring and control, and comprises an information acquisition module used for acquiring the running state of a rail car to obtain the running data of the rail car; the control processing module judges the operation state of the rail car according to the operation data of the rail car; the braking execution module controls the rail car to start and stop braking according to the running state output of the rail car; the power supply module is used for providing working voltage for the information acquisition module, the control processing module and the brake execution module; the wireless communication module is used for realizing short-distance data transmission and remote monitoring; whether the engine runs normally or not can be monitored in real time, and an instruction is immediately sent to the motor driver to enable the brake motor to act to achieve brake stopping when the engine is not provided with oil or accidentally flames out.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle monitoring and control, and particularly relates to an automatic brake control device for a rail vehicle. Background Art

[0002] The starting and stopping of the existing rail vehicle engine are both achieved by turning the vehicle key. If the engine stops, the brake no longer works. Especially when the track is on an uphill section, after the engine stops, the MCU cannot detect the signal, the brake control fails, and the vehicle slipping will lead to a runaway accident. Summary of the Invention

[0003] In view of the above or existing technical deficiencies, the present invention proposes an automatic brake control device for a rail vehicle, in which the vehicle brake can be... in the case of engine shutdown.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] The present invention provides an automatic brake control device for a rail vehicle, including:

[0006] An information acquisition module for acquiring the operation data of the rail vehicle by collecting the operation state of the rail vehicle;

[0007] A control processing module for judging the operation state of the rail vehicle according to the operation data of the rail vehicle;

[0008] A braking execution module for outputting to control the start and stop of the rail vehicle brake according to the operation state of the rail vehicle;

[0009] A power supply module for providing the working voltage for the information acquisition module, the control processing module, and the braking execution module;

[0010] A wireless communication module for realizing short-distance data transmission and remote monitoring;

[0011] The information acquisition module is connected to the rail vehicle drive circuit, the output end of the information acquisition module is connected to the control processing module, the output end of the control processing module is connected to the braking execution module, the output end of the braking execution module is connected to the brake motor, the output end of the power supply module is connected to the information acquisition module, the control processing module, and the braking execution module, and the control processing module is connected to the wireless communication module.

[0012] The information acquisition module is connected to the rail vehicle drive circuit, the output end of the information acquisition module is connected to the control processing module, the output end of the control processing module is connected to the braking execution module, and the output end of the braking execution module is connected to the brake motor.

[0013] As a further technical solution of the present invention, the information acquisition module includes:

[0014] A voltage adaptation unit, having a first impedance element and a second impedance element connected in series, forming a voltage division topology;

[0015] A signal shaping unit, including a rectifying circuit composed of at least one unidirectional conduction element;

[0016] A noise suppression unit, including a filtering circuit composed of at least one filtering capacitor.

[0017] The first impedance element and the second impedance element are connected in series to the ground. The positive electrode of the rectifying diode is connected to the output end of the first impedance element, and the output end of the unidirectional conduction element is connected to the noise suppression unit.

[0018] As a further technical solution of the present invention, in the voltage adaptation unit, the resistance value range of the first impedance element is 10 kΩ - 100 kΩ, and the resistance value range of the second impedance element is 1 kΩ - 10 kΩ, forming an adjustable voltage division ratio of 10:1 to 100:1.

[0019] Further, the control processing module is a single-chip microcomputer of the TMS320F28379D model.

[0020] As a further technical solution of the present invention, the braking execution module includes: a motor forward rotation driving circuit and a motor reverse rotation driving circuit;

[0021] The motor forward rotation driving circuit includes a first voltage dividing resistor, a first relay, and a first amplifier. The input end of the first voltage dividing resistor is connected to the output end of the control circuit, the output end of the first voltage dividing resistor is connected to the base of the first amplifier, the collector of the first amplifier is connected to the first relay, the emitter of the first amplifier is grounded, and the output end of the first relay is connected to the braking motor;

[0022] The motor reverse rotation driving circuit includes a second voltage dividing resistor, a second relay, and a second amplifier. The input end of the second voltage dividing resistor is connected to the output end of the control circuit, the output end of the second voltage dividing resistor is connected to the base of the second amplifier, the collector of the second amplifier is connected to the second relay, the emitter of the second amplifier is grounded, and the output end of the second relay is connected to the braking motor.

[0023] Further, the first relay and the second relay are double-contact magnetic latching relays, with a coil driving voltage of 24 VDC and a contact rated current of 30 A; the solid-state relay is a zero-crossing trigger type AC device, having functions of overvoltage protection and current transient suppression.

[0024] Further, the first relay is a normally closed relay, and the second relay is a normally open relay.

[0025] As a further technical solution of the present invention, it further includes: a power supply module, and the power supply module includes:

[0026] A main power supply unit, connected to the 24VDC power bus of the rail vehicle;

[0027] A backup power supply unit, including a hybrid energy storage device composed of a supercapacitor bank and a lithium battery bank;

[0028] A power supply switching unit, which uses a magnetic latching contactor to achieve seamless switching between the main and backup power supplies.

[0029] As a further technical solution of the present invention, it further includes a wireless communication module, and the wireless communication module includes:

[0030] A Bluetooth Low Energy interface for short-distance device debugging;

[0031] A LoRa wireless transmission unit for remote status monitoring;

[0032] A GPS positioning module for recording the geographical location information of braking events.

[0033] The beneficial effects of the present invention are:

[0034] The information acquisition module of the present invention is operatively coupled to the power system of the rail vehicle and is configured to obtain the operating state parameters of the rail vehicle in real time; the control processing module is communicatively connected to the information acquisition module and includes at least one microprocessor, which is configured to generate a brake control signal based on the operating state parameters; the braking execution module is electrically connected to the control processing module and the braking mechanism of the rail vehicle and includes a reversible motor drive circuit, which is configured to realize the forward drive and reverse release of the braking motor in response to the brake control signal; when the normal operation signal of the transmitter is provided to the MCU after signal voltage division, rectification and filtering, the MCU can monitor whether the engine is operating normally in real time. When the engine runs out of fuel or accidentally stalls, the MCU cannot detect the signal and immediately issues an instruction to the motor driver to make the braking motor act to achieve braking and shutdown. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a structural diagram of a rail vehicle brake automatic control device provided by an embodiment of the present invention;

[0037] Figure 2This is a circuit control diagram of an automatic braking control device for a rail vehicle provided by an embodiment of the present invention. Detailed implementation manners

[0038] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0039] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] Secondly, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0041] Embodiment

[0042] Figure 1 An automatic braking control device for a rail vehicle provided by an embodiment of the present invention as shown includes:

[0043] An information acquisition module 101, configured to collect the operating state of the rail vehicle to obtain rail vehicle operation data;

[0044] A control processing module 102, configured to judge the operating state of the rail vehicle according to the rail vehicle operation data;

[0045] A braking execution module 103, configured to output to control the start and stop of the rail vehicle braking according to the operating state of the rail vehicle;

[0046] A power supply module 104, configured to provide the working voltage for the information acquisition module, the control processing module, and the braking execution module;

[0047] A wireless communication module 105, configured to implement short-distance data transmission and remote monitoring;

[0048] The information acquisition module 101 is connected to the rail vehicle drive circuit. The output end of the information acquisition module 101 is connected to the control processing module 102. The output end of the control processing module 102 is connected to the braking execution module 103. The output end of the braking execution module 103 is connected to the brake motor. The output end of the power supply module 104 is connected to the information acquisition module 101, the control processing module 102, and the braking execution module 103. The control processing module 102 is connected to the wireless communication module 105.

[0049] In an embodiment of the present invention, an information acquisition module is operatively coupled to a rail vehicle power system and configured to obtain operation state parameters of the rail vehicle in real time; a control processing module is communicatively connected to the information acquisition module and includes at least one microprocessor, which is configured to generate a brake control signal based on the operation state parameters; a braking execution module is electrically connected to the control processing module and a rail vehicle braking mechanism and includes a reversible motor drive circuit, which is configured to realize forward driving and reverse release of a braking motor in response to the brake control signal.

[0050] In an embodiment of the present invention, when the normal operation signal of the engine is provided to the MCU after signal voltage division, rectification, and filtering, the MCU can monitor whether the engine is operating normally in real time. When the engine runs out of fuel or accidentally stalls, the MCU cannot monitor the signal and immediately issues an instruction to the motor driver to make the brake motor act to achieve braking and shutdown.

[0051] In an embodiment of the present invention, the information acquisition module 101 includes:

[0052] A voltage adaptation unit 111 having a first impedance element and a second impedance element connected in series to form a voltage division topology;

[0053] A signal shaping unit 112 including a rectification circuit composed of at least one unidirectional conduction element;

[0054] A noise suppression unit 113 including a filtering circuit composed of at least one filtering capacitor.

[0055] The first impedance element and the second impedance element are connected in series to the ground. The positive electrode of the rectification diode is connected to the output end of the first impedance element, and the output end of the unidirectional conduction element is connected to the noise suppression unit.

[0056] Among them, the resistance value range of the first impedance element in the voltage adaptation unit is 10 kΩ - 100 kΩ, and the resistance value range of the second impedance element is 1 kΩ - 10 kΩ, forming an adjustable voltage division ratio of 10:1 to 100:1.

[0057] Among them, the noise suppression unit includes an electrolytic capacitor and a ceramic capacitor connected in parallel. The capacitance value range of the electrolytic capacitor is 100 μF - 1000 μF, and the capacitance value range of the ceramic capacitor is 0.1 μF - 1 μF.

[0058] In an embodiment of the present invention, the control processing module is a single-chip microcomputer of the TMS320F28379D model, which is a dual-core of C28x + Cortex-M4, supports a CAN 2.0B bus interface, and is applicable to a rail vehicle braking system.

[0059] The control processing module includes an embedded controller with a CAN bus interface, configured to: calculate the instantaneous acceleration value of the rail vehicle in real time; generate an emergency braking signal when it detects that the acceleration change rate exceeds the first threshold; and generate a braking release signal when the speed value is lower than the second threshold.

[0060] In the embodiment of the present invention, the braking execution module 103 includes: a motor forward drive circuit 131 and a motor reverse drive circuit 132;

[0061] Among them, the motor forward drive circuit includes a first voltage-dividing resistor, a first relay, and a first amplifier. The input end of the first voltage-dividing resistor is connected to the output end of the control circuit, the output end of the first voltage-dividing resistor is connected to the base of the first amplifier, the collector of the first amplifier is connected to the first relay, the emitter of the first amplifier is grounded, and the output end of the first relay is connected to the brake motor;

[0062] The motor reverse drive circuit includes a second voltage-dividing resistor, a second relay, and a second amplifier. The input end of the second voltage-dividing resistor is connected to the output end of the control circuit, the output end of the second voltage-dividing resistor is connected to the base of the second amplifier, the collector of the second amplifier is connected to the second relay, the emitter of the second amplifier is grounded, and the output end of the second relay is connected to the brake motor.

[0063] See Figure 2 , the engine normal operation signal is divided by the first impedance element R1 and the second impedance element R2, rectified by the first diode D1, and filtered by the first capacitor to obtain a sampled voltage signal. The sampled voltage signal is analyzed and judged by the single-chip microcomputer of the TMS320F28379D model to determine whether the transmitter is operating normally. When the transmitter runs out of fuel or accidentally stalls, the single-chip microcomputer cannot detect the signal and immediately issues an instruction to make the first relay / second relay attract or disconnect through the first current-limiting resistor, the second current-limiting resistor, the first amplifier Q1, and the second amplifier Q2, realizing the forward or reverse rotation of the brake motor and achieving braking and shutdown.

[0064] In the embodiment of the present invention, the first relay and the second relay are double-contact magnetic latching relays, with a coil drive voltage of 24VDC and a contact rated current of 30A; the solid-state relay is a zero-crossing trigger type AC device with over-voltage protection for voltage and transient current suppression functions. Among them, the first relay is a normally closed relay and the second relay is a normally open relay.

[0065] In the embodiment of the present invention, the power supply module includes: a main power supply unit connected to the 24VDC power bus of the rail vehicle; a backup power supply unit including a hybrid energy storage device composed of a super capacitor bank and a lithium battery bank; and a power supply switching unit using a magnetic latching contactor to achieve seamless switching between the main and backup power supplies.

[0066] Among them, the wireless communication module includes: a Bluetooth Low Energy (BLE) interface for short-distance device debugging; a LoRa wireless transmission unit for remote status monitoring; and a GPS positioning module for recording the geographical location information of braking events.

[0067] In addition, although the operations of the method of the present invention are described in a specific order in the drawings, this does not require or imply that these operations must be performed in that specific order, or that all the shown operations must be performed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

Claims

1. An automatic control device for the brakes of a rail vehicle, characterized in that, Including: An information acquisition module for acquiring the operating data of the rail vehicle by collecting the operating state of the rail vehicle; A control processing module for judging the operating state of the rail vehicle according to the operating data of the rail vehicle; A braking execution module for outputting to control the start and stop of the rail vehicle's brake according to the operating state of the rail vehicle; A power supply module for providing the working voltage for the information acquisition module, the control processing module and the braking execution module; A wireless communication module for realizing short-distance data transmission and remote monitoring; The information acquisition module is connected to the drive circuit of the rail vehicle. The output end of the information acquisition module is connected to the control processing module. The output end of the control processing module is connected to the braking execution module. The output end of the braking execution module is connected to the brake motor. The output end of the power supply module is connected to the information acquisition module, the control processing module and the braking execution module. The control processing module is connected to the wireless communication module.

2. The automatic brake control device for a rail vehicle according to claim 1, characterized in that The information acquisition module includes: A voltage adaptation unit having a voltage division topology formed by a series connection of a first impedance element and a second impedance element; A signal shaping unit including a rectifying circuit composed of at least one unidirectional conduction element; A noise suppression unit including a filtering circuit composed of at least one filtering capacitor; The first impedance element and the second impedance element are connected in series to the ground. The positive electrode of the rectifying diode is connected to the output end of the first impedance element. The output end of the unidirectional conduction element is connected to the noise suppression unit.

3. An automatic control device for the brakes of a rail vehicle according to claim 2, characterized in that, In the voltage adaptation unit, the resistance value range of the first impedance element is 10 kΩ - 100 kΩ, and the resistance value range of the second impedance element is 1 kΩ - 10 kΩ, forming an adjustable voltage division ratio of 10:1 to 100:

1.

4. An automatic control device for a rail vehicle brake according to claim 1, characterized in that, The control processing module is a single-chip microcomputer of the TMS320F28379D model.

5. The automatic control device for the brake of a rail vehicle according to claim 1, characterized in that, The braking execution module includes: a motor forward rotation drive circuit and a motor reverse rotation drive circuit; The motor forward rotation drive circuit includes a first voltage dividing resistor, a first relay, and a first amplifier. The input end of the first voltage dividing resistor is connected to the output end of the control circuit. The output end of the first voltage dividing resistor is connected to the base of the first amplifier. The collector of the first amplifier is connected to the first relay. The emitter of the first amplifier is grounded. The output end of the first relay is connected to the brake motor; The motor reverse rotation drive circuit includes a second voltage dividing resistor, a second relay, and a second amplifier. The input end of the second voltage dividing resistor is connected to the output end of the control circuit. The output end of the second voltage dividing resistor is connected to the base of the second amplifier. The collector of the second amplifier is connected to the second relay. The emitter of the second amplifier is grounded. The output end of the second relay is connected to the brake motor.

6. The automatic braking control device for a rail vehicle according to claim 5, characterized in that, The first relay and the second relay are double-contact magnetic latching relays, with a coil drive voltage of 24 VDC and a contact rated current of 30 A.

7. An automatic control device for the brake of a rail vehicle according to claim 6, characterized in that, The first relay is a normally closed relay, and the second relay is a normally open relay.

8. An automatic braking control device for a rail vehicle according to claim 1, characterized in that, Also including: A power supply module, and the power supply module includes: A main power supply unit connected to the 24 VDC power bus of the rail vehicle; A backup power supply unit including a hybrid energy storage device composed of a super capacitor bank and a lithium battery bank; The power supply switching unit uses a magnetic latching contactor to achieve seamless switching between the main and backup power supplies.

9. The automatic control device for the brake of a rail vehicle according to claim 1, wherein, It also includes a wireless communication module, and the wireless communication module includes: A Bluetooth Low Energy interface for short-distance device debugging; A LoRa wireless transmission unit for remote status monitoring; A GPS positioning module for recording the geographical location information of braking events.

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